Disable JBIG2 cache; prevent data corruption - try 2.

core/src/fxcodec/jbig2/JBig2_SymbolDict.h

Index: core/src/fxcodec/jbig2/JBig2_SymbolDict.h
diff --git a/core/src/fxcodec/jbig2/JBig2_SymbolDict.h b/core/src/fxcodec/jbig2/JBig2_SymbolDict.h
index 19d0f606a54cfce66a57692446d20985db3f5cda..c8e39dc84576232888818d37cf3dbeb5d6c91062 100644
--- a/core/src/fxcodec/jbig2/JBig2_SymbolDict.h
+++ b/core/src/fxcodec/jbig2/JBig2_SymbolDict.h
@@ -4,19 +4,22 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _JBIG2_SYMBOL_DICT_H_
-#define _JBIG2_SYMBOL_DICT_H_
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_SYMBOLDICT_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_SYMBOLDICT_H_
 
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "../../../include/fxcrt/fx_basic.h"
 #include "JBig2_ArithDecoder.h"
-#include "JBig2_Define.h"
-#include "JBig2_Image.h"
+
+class CJBig2_Image;
 
 class CJBig2_SymbolDict {
  public:
   CJBig2_SymbolDict();
-  CJBig2_SymbolDict* DeepCopy();
   ~CJBig2_SymbolDict();
 
+  nonstd::unique_ptr<CJBig2_SymbolDict> DeepCopy() const;
+
  public:
   FX_DWORD SDNUMEXSYMS;
   CJBig2_Image** SDEXSYMS;
@@ -25,4 +28,4 @@ class CJBig2_SymbolDict {
   JBig2ArithCtx* m_grContext;
 };
 
-#endif
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_SYMBOLDICT_H_